Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong van cuc snippets" » "cong van code snippets", "cong vang cuc snippets", "cong san cuc snippets", "song van cuc snippets", "cong van duc snippets", "cong van luc snippets", "cong van cu snippets"
"python using java snippets" » "python using data snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("cong van cuc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong van cuc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong van cuc snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong van cuc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.